Math Intervention 3–5 Grade

Addition and Subtraction Concepts 53

Rigorous Problem Solving with the Concept of
Missing Part Subtraction 1

Teri has 18 pennies. She leaves some on the table and hides
some in her hand.

Complete the chart to represent how many pennies are on
the table, how many are hiding in her hand, and the related
subtraction equations. Note: Teri does not hide or leave zero
pennies on the table.

Part A

Total Pennies On the Table Hiding in

Teri’s hand

Subtraction

Equation

18 6 18 – 6 = 12

18 10

13 5

18 7

18 15

414

18 2

Part B

Write subtraction equations to represent two other ways Teri
could hide part of the 18 pennies.

© 2016, Math Intervention: Grades 3–5, Jennifer Taylor-Cox, Routledge